Perforated plate

Hi everybody, I define a perforated plate as porous-jump. 20% of the area of the plate is perforated. What value should i put for the permeability (in the boundary conditions)? CAn i find this value if i know that there are 20% perforations in the plate? Thank you.

The permeability factor should be used only whenever the viscous resistance is important (i.e. laminar flow), so forget about using if for a perforated plate. The Fluent help file (6.19.6) shows you how to set the inertial factor for perforated plate, with an example for 25% opena area. Based on this method your value would be 12.5.

Thank you Frank for sharing your experience with me. I tried to use the perforated plate (as porous jump) and i noticed a small deflection of the direction of the flow. According to my supervisor the result was satisfactory but not very realistic. Thank you very much.